Re: [9fans] A new language for Plan 9

[Pietro Gagliardi <pietro10@mac.com>]

I put up a new Bentley. This has support for, hopefully, all control
structures:

	if e then					if..then
		s
	if e then					if..then..else
			s
		else
			s
	while e do				while..do
		s
	loop					loop (infinite loop)
		s
	repeat					repeat..until (like do..while(!))
			s
		until e
	for i := e to e [by e] do			like in pascal, but with steps
		s
	for i := e downto e [by e] do	like in pascal, but with steps
		s

The file asm.b is a simple demonstration of the last two.

The Bentley compiler, when built, is named #b, so the 386 compiler
(and the only one so far) is 8b. The name is changed on build. This is
used exactly like the C compilers:

	8b asm.b
	8l -o asm asm.8
	asm

The -S option produces an Assembly listing, but does not build (the C
compilers do).

My only regret so far is that for loops generate a medium sized piece
of spaghetti (yum). See the comment in 8.c for details.

Set for the next release: arguments in procedures, functions, a more
sophisticated stack size algorithm, bit arrays.